- 设 y =y(x) 是由方程所确定的隐函数，则 .=
- 设函数y=y（x）由参数方程
- 曲线y=x(1+arcsin2/x)的斜渐近线方程为_______
- ________ (catch) in the rain, he was wet to the skin.
- ________ (fail) several times, they need some encouragement.
- The floor does not look so bad when ________ (sweep) clean.
- Some molecules are large enough ________ (see) under the electronic microscope.
- We were busy ________ (get) things ready for the trial production when he phoned us.
- A beam of light will not bend round corners unless ________ (make) to do so with the help of a reflecting device
置顶